US4367100A - Silicon steel and processing therefore - Google Patents
Silicon steel and processing therefore Download PDFInfo
- Publication number
- US4367100A US4367100A US06/085,094 US8509479A US4367100A US 4367100 A US4367100 A US 4367100A US 8509479 A US8509479 A US 8509479A US 4367100 A US4367100 A US 4367100A
- Authority
- US
- United States
- Prior art keywords
- steel
- coating
- weight
- parts
- silicon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 14
- 238000000137 annealing Methods 0.000 claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005097 cold rolling Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 239000010703 silicon Substances 0.000 claims abstract description 6
- 239000000155 melt Substances 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000005098 hot rolling Methods 0.000 claims abstract description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 9
- 229910052796 boron Inorganic materials 0.000 claims description 9
- 230000006872 improvement Effects 0.000 claims description 9
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- 230000002401 inhibitory effect Effects 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims 1
- 239000000347 magnesium hydroxide Substances 0.000 claims 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000470 constituent Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000011669 selenium Substances 0.000 description 3
- 229910052711 selenium Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910001679 gibbsite Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910018626 Al(OH) Inorganic materials 0.000 description 1
- OTRAYOBSWCVTIN-UHFFFAOYSA-N OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N Chemical compound OB(O)O.OB(O)O.OB(O)O.OB(O)O.OB(O)O.N.N.N.N.N.N.N.N.N.N.N.N.N.N.N OTRAYOBSWCVTIN-UHFFFAOYSA-N 0.000 description 1
- -1 alumina Chemical compound 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
- C23D5/10—Coating with enamels or vitreous layers with refractory materials
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
- C21D8/1283—Application of a separating or insulating coating
Definitions
- the present invention relates to an improvement in the manufacture of grain-oriented silicon steel.
- One of the steps in the manufacture of grain oriented silicon steel is the application of a coating prior to final texture annealing.
- the coating serves to separate and keep adjacent layers of coiled steel from adhering, and in certain instances as an aid in impurity removal and/or as a source of a beneficial inhibitor.
- the most widely accepted coatings are those which contain magnesium oxide as the major constituent. Magnesium oxide forms a glass on reaction with the steel, resulting in a coating known as forsterite.
- a coating which does not react with the steel and thereby form a glass.
- a coating which has been found to improve the magnetic quality of the steel. Additionally, a coating which results, after texture annealing in a uniform surface suitable for coatings which may be applied subsequent thereto.
- the coating contains aluminum hydroxide as the major constituent.
- a melt of silicon steel having, by weight, from 2.5 to 4.0% silicon is subjected to the conventional steps of casting, hot rolling, one or more cold rollings, an intermediate anneal when two or more cold rollings are employed, decarburizing, coating and final texture annealing; and to the improvement comprising the steps of applying a coating consisting essentially of:
- casting is intended to include continuous casting processes.
- a hot rolled band heat treatment is includable within the scope of the invention. It is preferred to cold roll the steel to a thickness no greater than 0.020 inch, without an intermediate anneal between cold rolling passes, from a hot rolled band having at thickness of from about 0.050 to 0.120 inch.
- the melt consists essentially of, by weight, up to 0.07% carbon, up to 0.24% manganese, up to 0.09% of material from the group consisting of sulfur and selenium, up to 0.0080% boron, up to 0.02% nitrogen, 2.5 to 4.0% silicon, up to 1.0% copper, up to 0.05% aluminum, up to 0.1% tin, balance iron.
- Melts consisting essentially of, by weight, 0.02 to 0.06% carbon, 0.015 to 0.15% manganese, 0.005 to 0.05% of material from the group consisting of sulfur and selenium, 0.0006 to 0.0080% boron, up to 0.01% nitrogen, 2.5 to 4.0% silicon, up to 1.0% copper, up to 0.009% aluminum, up to 0.1 % tin, balance iron, have proven to be particularly adaptable to the subject invention. Within the latter chemistry, boron is generally present in amounts of at least 0.0008%.
- Steel coated and texture annealed in accordance with the subject invention is characterized by improved magnetic quality and by a substantially uniform metallic surface substantially free of glass reaction products.
- Aluminum hydroxide does not react with silicon steel as does magnesium oxide and other conventional coatings. Aluminum hydroxide does not react and form a glass during texture annealing.
- Aluminum hydroxide is generally present in the coating in amounts of a least 80%, and preferably in amounts of at least 90%.
- the specific amount being required to ensure a texture annealed steel having a substantially uniform metallic surface substantially free of glass reaction products, being dependent upon the other constituents of the coating.
- the other constituents include up to 20 parts, by weight, of impurity removing additions and up to 10 parts, by weight, of inhibiting substances.
- Impurity removing additions can be substances, e.g. magnesia, which react with impurities such as sulfur and selenium, or substances, e.g. alumina, which hold adjacent layers of steel apart thereby allowing hydrogen (present in the annealing atmosphere) access to the steel.
- Typical inhibiting substances are boron and nitrogen. Boron has proven to be particularly adaptable to the subject invention.
- the coating contains from 1 to 5 parts, by weight, of substances from the group consisting of boron and compounds thereof. Sources of boron include boric acid, fused boric acid (B 2 O 3 ), ammonium pentaborate and sodium borate.
- the specific mode of applying the coating of the subject invention is not critical thereto. It is just as much within the scope of the subject invention to mix the coating with water and apply it as a slurry, as it is to apply it electrolytically. Likewise, the constituents which make up the coating can be applied together or as individual layers.
- the steel in its primary recrystallized state with the coating of the subject invention adhered thereto is also included as part of the subject invention.
- the primary recrystallized steel has a thickness no greater than 0.020 inch and is, in accordance with the present invention suitable for processing into grain oriented silicon steel.
- Heats A and B Two heats (Heats A and B) of silicon steel were cast and processed into silicon having a cube-on-edge orientation.
- the subject invention has proven to be particularly adaptable to steel of such an orientation.
- the chemistry for each of the heats appears hereinbelow in Table I.
- Processing for the heats involved soaking at an elevated temperature for several hours, hot rolling to a nominal gage of 0.080 inch, hot roll band normalizing at a temperature of approximately 1740° F., cold rolling to final gage, decarburizing at a temperature of approximately 1475° F., coating as described hereinbelow, and final texture annealing at a maximum temperature of 2150° F. in hydrogen. Primary recrystallization took place during the decarburizing heat treatment.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Chemical Treatment Of Metals (AREA)
- Soft Magnetic Materials (AREA)
Priority Applications (17)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/085,094 US4367100A (en) | 1979-10-15 | 1979-10-15 | Silicon steel and processing therefore |
AU62186/80A AU6218680A (en) | 1979-10-15 | 1980-09-10 | Silicon steel |
YU02327/80A YU232780A (en) | 1979-10-15 | 1980-09-12 | Process for obtaining grain=oriented electromagnetic silicon steel |
GB8029787A GB2063307B (en) | 1979-10-15 | 1980-09-15 | Annealing silicon steel |
CA000360839A CA1139643A (en) | 1979-10-15 | 1980-09-23 | Silicon steel and processing therefore |
ES495308A ES495308A0 (es) | 1979-10-15 | 1980-09-24 | Proceso perfeccionado para producir acero al silicio elec- tromagnetico de grano orientado |
HU802357A HU183219B (en) | 1979-10-15 | 1980-09-26 | Process for producing textureted electromagnetic silicon steel with clean to metal surface |
IT49768/80A IT1128686B (it) | 1979-10-15 | 1980-09-29 | Acciaio al silicio e procedimento di trattamento dello stesso |
AR282702A AR223070A1 (es) | 1979-10-15 | 1980-09-30 | Procedimiento para producir acero al silicio electromagnetico de grano orientado |
BR8006374A BR8006374A (pt) | 1979-10-15 | 1980-10-03 | Aperfeicoamento em processo para a producao de aco ao silicio eletromagnetico com grao orientado, aco ao silicio eletromagnetico com grao orientado e aco recristalizado principal |
DE19803038034 DE3038034A1 (de) | 1979-10-15 | 1980-10-08 | Siliciumstahl und verfahren zu dessen verarbeitung |
RO80102341A RO79062A (ro) | 1979-10-15 | 1980-10-11 | Compozitie de acoperire izolatoare pentru tabla electromagnetica din otel silicios |
SE8007169A SE8007169L (sv) | 1979-10-15 | 1980-10-14 | Kornorienterat kiselstal och sett att framstella detta |
BE2/58804A BE885686A (fr) | 1979-10-15 | 1980-10-14 | Procede pour preparer un acier au silicium electromagnetique a grains orientes et acier obtenu par ce procede |
PL22730880A PL227308A1 (de) | 1979-10-15 | 1980-10-15 | |
JP14425680A JPS5665983A (en) | 1979-10-15 | 1980-10-15 | Silicon steel |
FR8022057A FR2467242A1 (fr) | 1979-10-15 | 1980-10-15 | Procede pour preparer un acier au silicium electromagnetique a grains oriente et acier obtenu par ce procede |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/085,094 US4367100A (en) | 1979-10-15 | 1979-10-15 | Silicon steel and processing therefore |
Publications (1)
Publication Number | Publication Date |
---|---|
US4367100A true US4367100A (en) | 1983-01-04 |
Family
ID=22189432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/085,094 Expired - Lifetime US4367100A (en) | 1979-10-15 | 1979-10-15 | Silicon steel and processing therefore |
Country Status (17)
Country | Link |
---|---|
US (1) | US4367100A (de) |
JP (1) | JPS5665983A (de) |
AR (1) | AR223070A1 (de) |
AU (1) | AU6218680A (de) |
BE (1) | BE885686A (de) |
BR (1) | BR8006374A (de) |
CA (1) | CA1139643A (de) |
DE (1) | DE3038034A1 (de) |
ES (1) | ES495308A0 (de) |
FR (1) | FR2467242A1 (de) |
GB (1) | GB2063307B (de) |
HU (1) | HU183219B (de) |
IT (1) | IT1128686B (de) |
PL (1) | PL227308A1 (de) |
RO (1) | RO79062A (de) |
SE (1) | SE8007169L (de) |
YU (1) | YU232780A (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0577124A2 (de) * | 1992-07-02 | 1994-01-05 | Nippon Steel Corporation | Kornorientiertes Elektroblech mit hoher Flussdichte und geringen Eisenverlusten und Herstellungsverfahren |
US5507883A (en) * | 1992-06-26 | 1996-04-16 | Nippon Steel Corporation | Grain oriented electrical steel sheet having high magnetic flux density and ultra low iron loss and process for production the same |
US11827961B2 (en) | 2020-12-18 | 2023-11-28 | Vacuumschmelze Gmbh & Co. Kg | FeCoV alloy and method for producing a strip from an FeCoV alloy |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6048886B2 (ja) * | 1981-08-05 | 1985-10-30 | 新日本製鐵株式会社 | 鉄損の優れた高磁束密度一方向性電磁鋼板及びその製造方法 |
DE3875676T2 (de) * | 1987-08-31 | 1993-03-18 | Nippon Steel Corp | Verfahren zur herstellung von kornorientierten stahlblechen mit metallglanz und ausgezeichneter stanzbarkeit. |
CN113302324B (zh) | 2019-01-16 | 2023-06-02 | 日本制铁株式会社 | 单方向性电磁钢板及其制造方法 |
JP7196622B2 (ja) * | 2019-01-16 | 2022-12-27 | 日本製鉄株式会社 | 方向性電磁鋼板及び方向性電磁鋼板の製造方法 |
Citations (20)
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US3054732A (en) * | 1959-03-05 | 1962-09-18 | Gen Electric | Coated metallic sheet material and method of making the same |
US3076160A (en) * | 1960-01-11 | 1963-01-29 | Gen Electric | Magnetic core material |
US3132056A (en) * | 1961-05-19 | 1964-05-05 | Gen Electric | Insulating coating for magnetic sheet material and method for producing the same |
US3151000A (en) * | 1959-08-28 | 1964-09-29 | Hooker Chemical Corp | Method of applying highly heat resistant protective coatings to metallic surfaces |
US3151997A (en) * | 1961-09-29 | 1964-10-06 | United States Steel Corp | Separating-medium coating for preparation of electrical steel strip for annealing |
US3152930A (en) * | 1961-02-10 | 1964-10-13 | Westinghouse Electric Corp | Process for producing magnetic sheet materials |
US3282747A (en) * | 1964-04-13 | 1966-11-01 | Westinghouse Electric Corp | Annealing cube texture iron-silicon sheets |
US3375144A (en) * | 1965-06-09 | 1968-03-26 | Armco Steel Corp | Process for producing oriented silicon steels in which an annealing separator is used which contains a sodium or potassium, hydroxide or sulfide |
US3523837A (en) * | 1967-11-06 | 1970-08-11 | Westinghouse Electric Corp | Non-reactive refractory separating coatings for electrical steels |
US3523881A (en) * | 1966-09-01 | 1970-08-11 | Gen Electric | Insulating coating and method of making the same |
US3676227A (en) * | 1968-11-01 | 1972-07-11 | Nippon Steel Corp | Process for producing single oriented silicon steel plates low in the iron loss |
US3785882A (en) * | 1970-12-21 | 1974-01-15 | Armco Steel Corp | Cube-on-edge oriented silicon-iron having improved magnetic properties and method for making same |
US3832245A (en) * | 1971-06-14 | 1974-08-27 | Asea Ab | Method of manufacturing an object of silicon steel having low sulphur content |
US3932235A (en) * | 1973-07-24 | 1976-01-13 | Westinghouse Electric Corporation | Method of improving the core-loss characteristics of cube-on-edge oriented silicon-iron |
US3941623A (en) * | 1973-08-28 | 1976-03-02 | Nippon Steel Corporation | Method for producing a grain-oriented electrical steel sheet using separators comprising metal nitrides |
US4010050A (en) * | 1975-09-08 | 1977-03-01 | Allegheny Ludlum Industries, Inc. | Processing for aluminum nitride inhibited oriented silicon steel |
US4102713A (en) * | 1976-06-17 | 1978-07-25 | Allegheny Ludlum Industries, Inc. | Silicon steel and processing therefore |
US4160681A (en) * | 1977-12-27 | 1979-07-10 | Allegheny Ludlum Industries, Inc. | Silicon steel and processing therefore |
US4171994A (en) * | 1975-02-13 | 1979-10-23 | Allegheny Ludlum Industries, Inc. | Use of nitrogen-bearing base coatings in the manufacture of high permeability silicon steel |
US4179315A (en) * | 1976-06-17 | 1979-12-18 | Allegheny Ludlum Industries, Inc. | Silicon steel and processing therefore |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE896830C (de) * | 1941-05-20 | 1953-11-16 | Vacuumschmelze Ag | Verfahren zur Isolierung von Kernen |
US3794520A (en) * | 1967-11-06 | 1974-02-26 | Westinghouse Electric Corp | Nonreactive refractory separating coatings for electrical steels |
US3671335A (en) * | 1967-11-06 | 1972-06-20 | Westinghouse Electric Corp | Non-reactive refractory separating coatings for electrical steels |
JPS5844152B2 (ja) * | 1978-12-27 | 1983-10-01 | 川崎製鉄株式会社 | 下地被膜をほとんど有しない方向性珪素鋼板の製造方法 |
-
1979
- 1979-10-15 US US06/085,094 patent/US4367100A/en not_active Expired - Lifetime
-
1980
- 1980-09-10 AU AU62186/80A patent/AU6218680A/en not_active Abandoned
- 1980-09-12 YU YU02327/80A patent/YU232780A/xx unknown
- 1980-09-15 GB GB8029787A patent/GB2063307B/en not_active Expired
- 1980-09-23 CA CA000360839A patent/CA1139643A/en not_active Expired
- 1980-09-24 ES ES495308A patent/ES495308A0/es active Granted
- 1980-09-26 HU HU802357A patent/HU183219B/hu unknown
- 1980-09-29 IT IT49768/80A patent/IT1128686B/it active
- 1980-09-30 AR AR282702A patent/AR223070A1/es active
- 1980-10-03 BR BR8006374A patent/BR8006374A/pt unknown
- 1980-10-08 DE DE19803038034 patent/DE3038034A1/de not_active Withdrawn
- 1980-10-11 RO RO80102341A patent/RO79062A/ro unknown
- 1980-10-14 BE BE2/58804A patent/BE885686A/fr unknown
- 1980-10-14 SE SE8007169A patent/SE8007169L/ not_active Application Discontinuation
- 1980-10-15 PL PL22730880A patent/PL227308A1/xx unknown
- 1980-10-15 FR FR8022057A patent/FR2467242A1/fr not_active Withdrawn
- 1980-10-15 JP JP14425680A patent/JPS5665983A/ja active Pending
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3054732A (en) * | 1959-03-05 | 1962-09-18 | Gen Electric | Coated metallic sheet material and method of making the same |
US3151000A (en) * | 1959-08-28 | 1964-09-29 | Hooker Chemical Corp | Method of applying highly heat resistant protective coatings to metallic surfaces |
US3076160A (en) * | 1960-01-11 | 1963-01-29 | Gen Electric | Magnetic core material |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5507883A (en) * | 1992-06-26 | 1996-04-16 | Nippon Steel Corporation | Grain oriented electrical steel sheet having high magnetic flux density and ultra low iron loss and process for production the same |
EP0577124A2 (de) * | 1992-07-02 | 1994-01-05 | Nippon Steel Corporation | Kornorientiertes Elektroblech mit hoher Flussdichte und geringen Eisenverlusten und Herstellungsverfahren |
EP0577124A3 (en) * | 1992-07-02 | 1994-09-21 | Nippon Steel Corp | Grain oriented electrical steel sheet having high magnetic flux density and ultra low iron loss and process for producing the same |
US11827961B2 (en) | 2020-12-18 | 2023-11-28 | Vacuumschmelze Gmbh & Co. Kg | FeCoV alloy and method for producing a strip from an FeCoV alloy |
Also Published As
Publication number | Publication date |
---|---|
PL227308A1 (de) | 1981-08-21 |
RO79062A (ro) | 1982-08-17 |
DE3038034A1 (de) | 1981-04-30 |
ES8106561A1 (es) | 1981-08-16 |
GB2063307B (en) | 1984-03-07 |
IT8049768A0 (it) | 1980-09-29 |
GB2063307A (en) | 1981-06-03 |
AU6218680A (en) | 1981-04-30 |
JPS5665983A (en) | 1981-06-04 |
BR8006374A (pt) | 1981-04-22 |
HU183219B (en) | 1984-04-28 |
AR223070A1 (es) | 1981-07-15 |
ES495308A0 (es) | 1981-08-16 |
CA1139643A (en) | 1983-01-18 |
BE885686A (fr) | 1981-04-14 |
IT1128686B (it) | 1986-06-04 |
YU232780A (en) | 1983-02-28 |
FR2467242A1 (fr) | 1981-04-17 |
SE8007169L (sv) | 1981-04-16 |
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